White flower with light

Central bright spot in fresnel diffraction of a shadowgram. Color enhancement of 9b1144.

Fresnel diffraction on an aperture (diaphragm, pinhole) from a close distance. A round aperture is placed in the path of a Gaussian beam emitted by a laser. The resulting diffraction pattern is observed on a screen some distance away.

Three turban snail shells of different sizes

Focus ring on vintage camera

Fresnel diffraction on an aperture (diaphragm, pinhole) from a close distance. A round aperture is placed in the path of a Gaussian beam emitted by a laser. The resulting diffraction pattern is observed on a screen some distance away. Color enhancement of